Element 115 has not been discovered yet. Of course, we know there is such a thing, the only question is whether anyone can actually create an atom of it and then prove that they have done so. Chances are the atom will live only a few nanoseconds and the proof will consist of some trails in a cloud chamber that calculations will show could only have come from an atom of the element. There's virtually no chance that it will ever be possible to make more than a few atoms at a time.

Poster sample.
This silhouette represents the unknown future namesake of element 115 in my Photographic Periodic Table Poster. At the time of printing in 2006 the element had not yet been discovered, or at least not officially named, but some day it will be, and chances are it will be named after a person, since all the places likely to be the site of its discovery already have elements named after them. The sample picture includes text exactly as it appears in the poster, which you are encouraged to buy a copy of.Source:Theodore GrayContributor:Theodore GrayAcquired:15 April, 2006Text Updated:4 May, 2007Price: DonatedSize: 6"Purity: 0%